Indicator for rubber-mills.



I G. E. NETLEoN. INDICATOR FOR RUBBER MILLS.

-APPLICATION FILED MAY 1916.

Patented Dec. 5, 1916.

WITNESS:

srATns PATENT onirica. i

GRGEJET'TTON; OFIARTFORD, c oNNncTroUT, Assrenonro THE nnnfrronn" To all whom t may concern Be it known that I, GEORGE NETTLETON,

Rubber-Mills, of which the following is a full, clear, and exact description.

This invention relates to rubber mixing, warming and washing mills and has for an object to provide a device for assisting the operator in maintaining the rolls parallel and spaced a delinite distance apart.

Unskilled laborers.` are usually employed to operate rubber mills. Great diliculty is experienced in getting these workmen to keep the rolls parallel with each other. Oftentimes they will operate the mill with the rolls disposed obliquely to each other and this does not produce the desired kneading ofthe rubber batch. Furthermore the rolls are/sometimes set so far apartthat when a new batch of hard rubber stock is put in the mill the shock causes the breaking of the rolls and in some cases even causes breaking of the mill frame and other parts. To overcome these disadvantages, the present invention provides indicators which are operated by the adjusting screws of the mill rolls to indicate to the workman the exact amount of opening between the rolls, so that will have no excuse for running the mill with the rolls'not parallel, or spaced too far apart.

With the above and other objects in view, the invention consists in certain novel details of construction Iand combinations of parts hereinafter fully described and claimed it being understood that various modiications mav be resorted to within the scope of the appended claim.

In the accompanying drawing forming part of this specification, Figure 1 is an end elevation of a mill equipped with the indicator. Fig. 2 is a plan view of the parts shown in Fig. 1.

Referring now to the drawing in which like characters of reference designate simin lar parts, 10 designates rolls, 11 the bearings thereof, 12 the frame, and 13 the adjusting screws for the bearings, all of these parts being rof the usual and well-known rubber Spe'cication of Letters Patent.

Patented Dec. 5,1916.

` Application filed May 6, 1916. Serial N o. 95,772.

mill construction. As usual, the rolls are runv with a slight space existing between them, this space being determined by the ex- .tent to which the adjusting screws `13 are backedv out from their respective threaded openings in the frame.

In carrying out the invention, I secure a collar 14 upon each adjusting screw, the collar being formed of two halves detachably secured together by a screw 15. .Each collar is provided with a peripheral scale formed of spaced circular division marks Fixed to the 16 scored upon the collar. mill frame above each collar is a pointer 17 which is adapted to register with the scale ofthe collar.

In assembling the parts the mill'rolls l0 are ir'st moved into contact with each other by screwing'tight the adjusting screws 13 of one of the rolls. The collars 14 are then adjusted longitudinally of and bolted upon the adjusting screws of said roll so that their outer end faces 18 are flush with the ends of the pointers 17, Said adjusting screws 13 are now backed out sufliciently from the mill frame to provide the desired space between the mill rolls, this movement of the screws causing the division marks on the scales 'to become visible beyond the pointers and indicate the amount of space between the mill rolls.

By reading the scales when adjusting the mill rolls, the Workman is enabled to lknow definitely the amount of space existing between the ends of the mill rolls, and by making sure that the same number of 'division marks are visible on each collar beyond the respective pointer, he may know positively that the rolls are parallel. Since any movement of the adjusting screws permits of a corresponding space existing between the mill rolls, the workman needVA only manipulate the adjusting screws until' aprescribed number of division marks of l'the scales appear 'beyond the pointers in order ,to space the rolls a required definite dishaving a pepheml scale, and'pointers onl the frame egsterng with the scales on the cllars. l 10 Signed at Hartford, Conn., this 19th day @mi miusngg the rolls, a oar fm'merl in of April? 1916,

uns femmfaby secured together :ml ad- Luabs ongtudinay of each screw and GEORGE E. NETTLETON. 

